| 摘要 |
PCT No. PCT/DE85/00093 Sec. 371 Date Aug. 29, 1985 Sec. 102(e) Date Aug. 29, 1985 PCT Filed Mar. 28, 1985 PCT Pub. No. WO85/04461 PCT Pub. Date Oct. 10, 1985.A feedthrough for a conductor in a wall opening which may be subjected to fire comprises to elastomeric parts including a hard part fitted into a soft part and together defining a conductor passage. The soft part presses against the wall opening. The hard part which consists of an elastomeric material contains a large amount of fire-retardant additive. The hard part also may have spaces receiving a fire-retardant substance which communicates by ducts along the joint surfaces of the two parts with the conductor passage. |
